Blended learning is poised to transform American education by personalizing student learning – uniting the highest-quality online content with highly-effective educators in “live” instruction and supervisory roles. This white paper from Innosight Institute (now the Clayton Christensen Institute for Disruptive Innovation), the Charter School Growth Fund, and Public Impact defines six models of blended learning, provides vivid examples of blended learning in action, and discusses both the technology and policies needed to realize the promise of blended learning. The white paper highlights the importance of creating policy environments that grant innovative educators autonomy, enabling them to design and implement models based on affordable quality and personalization. In these policy environments, the focus of regulation must not be on input-focused rules, but on accountability for outcomes.